Blog · October 14, 2026 · Mississippi
DeSoto County Flood Zone Map, Mississippi
How to check whether a property in DeSoto County sits in a FEMA flood zone, and what the answer means for a buyer near Olive Branch.
Main page: DeSoto County, MS GIS & Parcel Viewer (official map link, DeSoto County facts and neighboring maps).
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Is that lot in Walls in a flood zone? The DeSoto County flood zone map answer comes from FEMA, and it is free to look up. You can check it yourself for any Walls address in a few minutes.
The sections below go from the FEMA search to the DeSoto County parcel record, then cover insurance, permits and map changes near Southaven.
How to use the DeSoto County flood zone map
Start at the FEMA Flood Map Service Center and enter the property address in Hernando or anywhere else in the county. The site returns the effective Flood Insurance Rate Map (FIRM) panel covering that Hernando location, which you can view or download. For an irregular lot near Southaven, the National Flood Hazard Layer viewer is easier to use, so you can see whether the shading reaches a house near Southaven. Next, the DeSoto County ArcGIS parcel map confirms which DeSoto County parcel you're looking at. The DeSoto County record gives the parcel identifier and legal description that an insurer or lender near Hernando may ask for.
Finding the tract on the DeSoto County map
For land around Olive Branch, open the DeSoto County ArcGIS parcel map (an Esri ArcGIS web map); it is the map DeSoto County itself publishes. Most people find their DeSoto County tract fastest by searching an address in Olive Branch, then clicking the outline. For a backup route to the map covering Olive Branch, our DeSoto County directory entry keeps the link current.
Reading the zones on a DeSoto County flood map
Any DeSoto County parcel shaded as Zone A, AE, AH or AO sits in what FEMA calls a Special Flood Hazard Area, meaning FEMA estimates a 1-percent annual chance of flooding. Where a DeSoto County tract lists Zone AE, there's a base flood elevation to compare a building against; in Zone A there isn't one. Land near Southaven in shaded X (Zone B on older maps) falls between the base flood and the 500-year flood. Unshaded Zone X near Southaven is minimal risk.
Unmapped creeks in DeSoto County
A creek near Southaven that lists no detailed zone, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
When the map affects a deal
Here's why the zone matters at a closing in Hernando. When a county home falls inside an A or V zone and carries a federally backed mortgage, the lender must require flood coverage; that applies where the local government around Southaven is in the National Flood Insurance Program. In Zone X near Hernando, federal rules do not require a policy, although some lenders require it anyway. When a DeSoto County homesite is on a rise inside a mapped zone, the landowner can ask FEMA for a Letter of Map Amendment (LOMA), usually backed by an elevation certificate from a surveyor who works in DeSoto County. Adding on to a house near Southaven inside the zone frequently requires a permit and an elevation check, so call the county or the town office in Hernando before work starts.
Questions to ask before buying in DeSoto County
For a house near Walls, ask the seller for any elevation certificate on file and the current flood insurance declarations page. An agent working in DeSoto County can quote flood coverage once you know the zone for the lot near Walls.
Near the DeSoto County line
DeSoto County borders Crittenden County, AR, Marshall County, Tate County, Tunica County, and Shelby County, TN, and each keeps its own parcel map and records. Our Mississippi page links each map neighboring DeSoto County.
DeSoto County, MS: common questions
What does BFE mean on the flood map for Horn Lake?
Near Walls, the base flood elevation marks how high the 100-year flood is expected to rise, and it is printed in AE zones.
What does Zone AE mean on a DeSoto County flood map?
Zone AE on a lot in Horn Lake is a mapped 100-year floodplain with a base flood elevation, so mandatory insurance rules apply to federally backed mortgages.
Who prepares an elevation certificate for a house in Horn Lake?
Hire a licensed land surveyor or engineer who works in DeSoto County; ask the local floodplain office first in case one exists.
Can I build in a flood zone in DeSoto County?
Often, but local floodplain rules apply; ask the county or town building office in Horn Lake well before you buy.
Does a 100-year floodplain near Walls flood only once a century?
Not at all; a county tract in that zone faces a 1-percent annual chance, and two floods in one decade near Horn Lake are possible.
My house near Walls is in Zone X. Is insurance required?
FEMA does not require it for a Zone X lot in Horn Lake, but coverage is available and some lenders ask for it.
Open the official DeSoto County, MS parcel map DeSoto County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.